I said Regal like 6 posts ago but I would assume a McMahon or Austin would be announced. Was Cole ever GM for a day or anything?
Ah, yes you did. Missed that post.
I don't think Cole was ever GM even for a day. I know Jericho was, so he could theoretically take claim to GM spot, saying that he did hold it for one night. Paul Heyman was GM of Smackdown before, and I think that counts, so he has a chance. Bret Hart was also GM for a few weeks in 2010 so it could be him. Though I think he would have been announced as well.
If it could be someone who was not GM before, what about Arn Anderson?